基于匹配法的不同种类煤和矸石发射率测量研究

煤和矸石的种类、表面纹理结构、变质和发育程度等因素都会对其发射率产生较为显著的影响,精准的发射率参数设置对红外热像仪测温及煤和矸石红外图像的识别至关重要。提出了一种基于匹配法的煤和矸石发射率测量方法,即采用表面热电偶与红外热像仪相结合的方式测量煤和矸石发射率。用密闭的电热炉对被测煤和矸石进行均匀加热,待被测煤和矸石均匀受热且稳定后,用表面热电偶对被测煤和矸石的选定区域进行真实温度测定(标定为t1),然后用红外热像仪对同一区域进行温度测定(标定为t2),最后对红外热像仪的发射率进行调试,当t2=t1时,得出的发射率即为被测煤和矸石在该温度下的真实发射率。实验结果表明:(1)等温条件下,煤和矸石表面越粗糙,其发射率数值越大,表明煤和矸石表面的粗糙度是导致二者产生不同发射率的内在因素。(2)4种不同种类煤和矸石发射率随温度的增大呈幂函数降低,且拟合函数相关系数R2达0.98以上,验证了匹配法应用于煤和矸石发射率测量的可行性。(3)采用反代法得出在不同温度条件下实测值与理论值的误差率均小于3%,验证了实验中测量的煤和矸石发射率的准确性。

Determination of Sulphonylurea Glimepiride in Dog Serum by RP-HPLC with Pre-column Derivatization

Aim A simple, sensitive and rapid RP HPLC method with pre column derivatization has been developed for the determination of sulphonylurea glimepiride in dog serum. Methods The sulphonylurea glimepiride was extracted from the dog serum using dichlromethane followed by derivatization with DNBF for 20 min at 100℃. The solvent was then evaporated at 60℃ under nitrogen, and the residue was taken up in 100 μL of mobile phase consisting of acetonitrile water (75∶30, v/v). The separation was performed on a Hypersil BDS C18 column with a flow rate of 0 8 mL·min -1 , and the ultraviolet detector wavelength was set at 350 nm. Results Extraction recovery ranged from 75.9% to 83.2%, and methodological recovery was between 96.5% and 109.3%. Within day RSD ranged from 1.5% to 6.3%, and inter day RSD was between 2 9% and 14.8%. The method showed good linearity (R=0.9998). Conclusion The method was simple, convenient and sensitive. The reaction of derivatization was reproducible.

Metabolic and Endocrine Responses of Desert-Adapted Mice Reproductive System to Increased Salinity

From an evolutionary point of view, reproduction timing is an important adaptation which enables the transfer of genetic properties, thus enabling species continuation. Rodents inhabiting arid environments need reliable cues for triggering their reproduction. Results of previous studies showed that increased dietary salinity plays an important role as an ultimate regulator for desert adapted rodents＇ reproductive system. The authors aimed discovering pathways by which high salinity can affect the reproductive system and metabolic status of desert adapted common spiny mice, Acomys cahirinus. Mice were challenged with osmotic stress, water source salinity increased gradually from 0.9% - 5% NaCI under short days （SD） and long days （LD）. The authors assessed leptin and free fatty acid （FFA） levels using ELISA while, SYBR green technology was used for relative receptor expression （RQ） of target genes. Results revealed that serum levels of the hormone leptin were significantly （P 〈 0.05） reduced in salinity treated （ST） mice. Levels of FFA were significantly （P 〈 0.05） increased in LD- and SD-ST-males. In ST-SD females a significant increase （P 〈 0.05） in expression levels of leptin （Ob-Rt） mRNA receptor gene, in ovaries was noted. Aldosteron （Nr3c2） and vasopressin （AVP） mRNA receptor expression genes levels were significantly （P 〈 0.05） increased in both LD- and SD- ST- males.

Application of LC-MS based glutathione-trapped reactive metabolites in the discovery of toxicity of traditional Chinese medicine

We summarized the discovery of liquid chromatography mass spectrometry （LC-MS） based glutathione （GSH） capture of reactive metabolites in traditional Chinese medicine （TCM）, which provides scientific basis for further research and clinical application of Chinese medicine toxicity discovery. This dissertation overviews relevant literatures of GSH capture of reactive metabolites in recent years. And then we review the principles and methods of LC-MS based GSH capture of reactive metabolites, as well as the research progress in the discovery of toxicity of TCM including pyrrolizidine alkaloids, furans and quinoid species. The review shows that the representative compounds of TCM includes adonifoline, lasiocarpine, diosbulbin B and safrol are well dctected by LC-MS based GSH capture technique. And the main analytic systems of LC-MS are triple quadrupole and Q-Trap mass spectrometer. Constant neutral loss scan （CNLS）, precursor ion scan （PIS） and multiple reaction monitor （MRM） are main detection methods to monitor the characteristic GSH conjugate fragmentations. The approach of LC-MS based GSH-trapped metabolites has a good application prospect in the discovery of toxic components of TCM.

su(1,2) Algebraic Structure of XYZ Antiferromagnetic Model in Linear Spin-Wave Frame

The XYZ antiferromagnetic model in linear spin-wave frame is shown explicitly to have an su（1,2） algebraic structure： the Hamiltonian can be written as a linear function of the su（1,2） algebra generators. Based on it, the energy eigenvalues are obta/ned by making use of the similar transformations, and the algebraic diagonalization method is investigated. Some numerical solutions are given, and the results indicate that only one group solution could be accepted in physics.

On maximal non-selfadjoint reflexive algebras associated with a double triangle lattice

We show that the reflexive algebra Alg(L) given by a double triangle lattice L in a finite factor M(with L" = M) is maximal non-selfadjoint in the class of all weak operator closed subalgebras with the same diagonal subalgebra Alg(L) ∩ Alg(L)^+.Our method can be used to prove similar results in finite-dimensional matrix algebras.As a consequence,we give a new proof to the main theorem by Hou and Zhang(2012).